How can I visualize a histogram with Promdash or Grafana?

Question

I\'m attracted to prometheus by the histogram (and summaries) time-series, but I\'ve been unsuccessful to display a histogram in either promdash or grafana. What I expect is to

Answer 1

Recent releases of Grafana have a builtin Heatmap visualization type, but use it sparingly as it can be very computationally expensive.

One can achieve a histogram by selecting a Graph visualization then under Axes selecting Histogram for X-Axis>Mode.

Here is an example with Grafana 7.03. Data collected by ceph_exporter into Prometheus. The metric is ceph_osd_utilization. The query uses a templated variable but that's orthogonal to this question.